The 501st legion, led by Anakin Skywalker(Darth Vader) massacred thousands of Jedi in the Jedi temple. These elite clones soon became known as Vader's fist and the image of them would strike fear into any opponents.

lighter blue? that color is perfect! And I don't mean to be cocky but its definetly one of the best here! Oh, I don't have hundreds of clones which I can just chuck in the bin if I don't like it and sharpie does't come off!